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<x-charset iso-8859-1>First off... random miss is much more likely the ignition than the FI... dont fall into the trap of blaming the FI until you know for sure your ignition system is fully functional. Fuel dampners can look mighty rusty, and they can rust through, but until then they wont fail internally... paint it up with some POR 15. Random missing caused by the FI is limited to a few things... bad ground connection, dirt in the trigger points (symptom is USUALLY a breif total cutout on 2 or all 4 cylinders... or a quick jerky loss of power), a bad head temp sensor (usually a total cutout for a second or more), or a loss of B+ somewere earlier on but again it would cut out completely for some period of time. Idle speed is a simple air bypass to the throttle valve.. adjusted with that screw valve. It should be capable of 1200 or more RPM... unless that bypass orifice is plugged, its real simple so if your unable to get the idle speed and it is making a difference by adjusting the screw then the pressure sensor or the hose to it could be bad. Keith Keith Park Top Notch Restorations topnotch@nycap.rr.com 71 Squareback (with no empty nipples!) 65 Notchback (still suckin its gas!) 65 Squareback 75 Opel 87 Golf 88 Rx7 10th Anniversary ----- Original Message ----- From: Christopher Sheridan <csheridan@virtual-consulting.net> To: <type3@vwtype3.org> Sent: Sunday, December 30, 2001 6:44 PM Subject: [T3] Fastback Troubles...engine still missing - update > I changed the fuel filter, reset the points, rechecked the timing and the > idle and still had the miss...read Jim's post about changing the voltage > regulator to a new one and went out and did it. > > The old regulator was black on one side and had evidence of burning on the > bottom of it > I was getting a dim surging red light as I drove previously. Switched the > regulator for new bosch and the dim light went completely out. drove it > around the block a few times with wipers and lights and it sounded good. > let it idle for awhile and it idled smoothly with the exception of an > occasional miss. Don't know what this means in terms of a longer ride, but > will check it out tonight on a drive to Oakland to see a show. if I come > back behind a tow truck I'll know its the FI. > > questions: > 1) when I set the idle I encountered a mystery...the idle adjustment screw > range doesn't seem to raise the idle above 800rpm...which seems awfully low > for a VW to idle at...I'm used to running my MT bus at about 1000 just > because I like it to be peppy, usually tweaking the 009 a bit to achieve > this...the book says to set the idle for an Automatic between 900 & 1000 yet > I can't seem to get it that high...Timing strictly at 0 degrees. > Is this something thats happened to other people, or is my Tach defective? > > 2) I noticed what Muir calls a Fuel Dampner in-line between my fuel pump and > the motor, Muir says it irons out the surges in the fuel pump. It looks like > it's been on there since WWII. Is this something that goes bad? Is it an > available part? > > Thanks for all the help, especially the tip on the Voltage > Regulator...hopefully that made the car driveable... > > -Chris > > ------------------------------------------------------------------- > Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe > > </x-charset>